Arbuscular mycorrhizal enhancement of iron concentration by Poncirus trifoliata L. Raf and Citrus reticulata Blanco grown on sand medium under different pH

Wang, Mingyuan; Christie, Peter; Xiao, Zhi-Yan; Qin, Changping; Wang, Peng; Liu, Jinfa; Xie, Yingping; Xia, Ren‐Xue

doi:10.1007/s00374-008-0290-6

Cited by 27 publications

(11 citation statements)

References 42 publications

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“…AM have been reported to improve the iron nutrition of woody plants under some conditions [55]–[57], but improved iron uptake was unlikely in our experiment because the best E. tetrodonta growth was associated with the lowest mean AM colonization. Alternatively, under some conditions AM fungi might exacerbate iron deficiency by producing the glycoprotein glomalin [58] which can contain 8.8% iron by weight [59].…”

Section: Discussionmentioning

confidence: 80%

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

et al. 2013

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Eucalyptus tetrodonta, a co-dominant tree species of tropical, northern Australian savannas, does not invade adjacent monsoon rain forest unless the forest is burnt intensely. Such facilitation by fire of seedling establishment is known as the "ashbed effect." Because the ashbed effect might involve disruption of common mycorrhizal networks, we hypothesized that in the absence of fire, intact rain forest arbuscular mycorrhizal (AM) networks inhibit E. tetrodonta seedlings. Although arbuscular mycorrhizas predominate in the rain forest, common tree species of the northern Australian savannas (including adult E. tetrodonta) host ectomycorrhizas. To test our hypothesis, we grew E. tetrodonta and Ceiba pentandra (an AM-responsive species used to confirm treatments) separately in microcosms of ambient or methyl-bromide fumigated rain forest soil with or without severing potential mycorrhizal fungus connections to an AM nurse plant, Litsea glutinosa. As expected, C. pentandra formed mycorrhizas in all treatments but had the most root colonization and grew fastest in ambient soil. E. tetrodonta seedlings also formed AM in all treatments, but severing hyphae in fumigated soil produced the least colonization and the best growth. Three of ten E. tetrodonta seedlings in ambient soil with intact network hyphae died. Because foliar chlorosis was symptomatic of iron deficiency, after 130 days we began to fertilize half the E. tetrodonta seedlings in ambient soil with an iron solution. Iron fertilization completely remedied chlorosis and stimulated leaf growth. Our microcosm results suggest that in intact rain forest, common AM networks mediate belowground competition and AM fungi may exacerbate iron deficiency, thereby enhancing resistance to E. tetrodonta invasion. Common AM networks–previously unrecognized as contributors to the ashbed effect–probably help to maintain the rain forest–savanna boundary.

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Section: Discussionmentioning

confidence: 80%

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

et al. 2013

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“…However, studies on the role of AM in plant uptake of other nutrients, such as Fe (e.g., Wang et al 2008) and Zn (e.g., Ortas 2010), have been performed. Lehmann et al (2014) and Lehmann & Rillig (2015) made meta-analyses of studies of AM contribution to Zn, Cu, Mn and Fe nutrient concentrations in plants.…”

Section: Discussionmentioning

confidence: 99%

Functional compatibility in cucumber mycorrhizas in terms of plant growth performance and foliar nutrient composition

Ravnskov

Larsen

2016

Plant Biol J

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Functional compatibility in cucumber mycorrhizas in terms of plant and fungal growth, and foliar nutrient composition from all possible combinations of six cucumber varieties and three species of arbuscular mycorrhizal (AM) fungi was evaluated. Measurements of foliar nutrient composition included N, P, K, Mg, Ca, Na, Fe, Zn, Mn and Cu. Growth of AM fungi was measured in terms of root colonisation, as examined with microscopy and the AM fungus biomarker fatty acid 16:1ω5 from both phospholipids and neutral lipids. Different responses of plant growth and foliar nutrient profiles were observed for the different AM symbioses examined. The AM fungus Claroideoglomus claroideum caused growth depression in association with four out of six cucumber varieties; Rhizophagus irregularis caused growth promotion in one of six cucumber varieties; whereas Funneliformis mosseae had no effect on the growth performance of any of the cucumber varieties examined. All three AM fungi markedly altered host plant shoot nutrient composition, with the strongest contrast observed between cucumber-R. irregularis symbioses and non-mycorrhizal cucumber plants, independent of cucumber variety. On the other hand, AM fungal growth in roots differed between the three AM fungi, but was unaffected by host genotype. Strong build-up of storage lipids was observed for R. irregularis, which was more moderate in the two other AM fungi. In conclusion, strong differential responses of cucumber varieties to inoculation with different AM fungi in terms of growth and shoot nutrient composition revealed high functional diversity in AM symbioses in cucumber plants.

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“…There have been reports of the role AM symbiosis plays in plant tolerance to high Zn soils (Audet and Charest, 2006; Hildebrandt et al, 2007) as well as in improving plant nutrition under low Zn (Cavagnaro, 2008; Chen et al, 2003; Subramanian et al, 2008) and low Fe conditions (Caris et al, 1998; Wang et al, 2007, 2008). The sequence assembly contig05640 encodes a putative fungal Zn transporter that is 83% similar to the Zn transporter EAU29689 from Aspergillus terreus .…”

Section: Discussionmentioning

confidence: 99%

Inside Arbuscular Mycorrhizal Roots – Molecular Probes to Understand the Symbiosis

et al. 2013

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Associations between arbuscular mycorrhizal (AM) fungi and plants are an ancient and widespread plant microbe symbioses. Most land plants can associate with this specialized group of soil fungi (in the Glomeromycota), which enhance plant nutrient uptake in return for C derived from plant photosynthesis. Elucidating the mechanisms involved in the symbiosis between obligate symbionts such as AM fungi and plant roots is challenging because AM fungal transcripts in roots are in low abundance and reference genomes for the fungi have not been available. A deep sequencing metatranscriptomics approach was applied to a wild-type tomato and a tomato mutant (Solanum lycopersicum L. cultivar RioGrande 76R) incapable of supporting a functional AM symbiosis, revealing novel AM fungal and microbial transcripts expressed in colonized roots. We confirm transcripts known to be mycorrhiza associated and report the discovery of more than 500 AM fungal and novel plant transcripts associated with mycorrhizal tomato roots including putative Zn, Fe, aquaporin, and carbohydrate transporters as well as mycorrhizal-associated alternative gene splicing. This analysis provides a fundamental step toward identifying the molecular mechanisms of mineral and carbohydrate exchange during the symbiosis. The utility of this metatranscriptomic approach to explore an obligate biotrophic interaction is illustrated, especially as it relates to agriculturally relevant biological processes.

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Arbuscular mycorrhizal enhancement of iron concentration by Poncirus trifoliata L. Raf and Citrus reticulata Blanco grown on sand medium under different pH

Cited by 27 publications

References 42 publications

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

Functional compatibility in cucumber mycorrhizas in terms of plant growth performance and foliar nutrient composition

Inside Arbuscular Mycorrhizal Roots – Molecular Probes to Understand the Symbiosis

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